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// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
/***************************************************************************
IBM PC AT compatibles 8042 keyboard controller
***************************************************************************/
#ifndef MAME_MACHINE_AT_KEYBC_H
#define MAME_MACHINE_AT_KEYBC_H
#pragma once
#include "cpu/mcs48/mcs48.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> at_keyboard_controller_device
class at_keyboard_controller_device : public device_t
{
public:
// construction/destruction
at_keyboard_controller_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
auto system_reset_cb() { return m_system_reset_cb.bind(); }
auto gate_a20_cb() { return m_gate_a20_cb.bind(); }
auto input_buffer_full_cb() { return m_input_buffer_full_cb.bind(); }
auto output_buffer_empty_cb() { return m_output_buffer_empty_cb.bind(); }
auto keyboard_clock_cb() { return m_keyboard_clock_cb.bind(); }
auto keyboard_data_cb() { return m_keyboard_data_cb.bind(); }
// interface to the host pc
DECLARE_READ8_MEMBER( data_r );
DECLARE_WRITE8_MEMBER( data_w );
DECLARE_READ8_MEMBER( status_r );
DECLARE_WRITE8_MEMBER( command_w );
// interface to the keyboard
DECLARE_WRITE_LINE_MEMBER( keyboard_clock_w );
DECLARE_WRITE_LINE_MEMBER( keyboard_data_w );
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual const tiny_rom_entry *device_rom_region() const override;
virtual ioport_constructor device_input_ports() const override;
virtual void device_add_mconfig(machine_config &config) override;
private:
// internal 8042 interface
DECLARE_READ_LINE_MEMBER( t0_r );
DECLARE_READ_LINE_MEMBER( t1_r );
DECLARE_READ8_MEMBER( p1_r );
DECLARE_READ8_MEMBER( p2_r );
DECLARE_WRITE8_MEMBER( p2_w );
// internal state
upi41_cpu_device *m_cpu;
// interface to the host pc
devcb_write_line m_system_reset_cb;
devcb_write_line m_gate_a20_cb;
devcb_write_line m_input_buffer_full_cb;
devcb_write_line m_output_buffer_empty_cb;
// interface to the keyboard
devcb_write_line m_keyboard_clock_cb;
devcb_write_line m_keyboard_data_cb;
uint8_t m_clock_signal;
uint8_t m_data_signal;
};
// device type definition
DECLARE_DEVICE_TYPE(AT_KEYBOARD_CONTROLLER, at_keyboard_controller_device)
#endif // MAME_MACHINE_AT_KEYBC_H
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